公开(公告)号：US09181125B2

公开(公告)日：2015-11-10

申请号：US14223205

申请日：2014-03-24

申请人： Prysmian S.p.A.

发明人： Silvio Frigerio ,  Lidia Terruzzi ,  Giovanni Villani ,  Corrado Castoldi

IPC分类号： C03B37/02 ,  C03C25/10 ,  C03C25/18

CPC分类号： C03C25/102 ,  C03B37/02 ,  C03C25/18 ,  C03C25/475

摘要： A method of coloring optical fibers during the optical fiber drawing that includes the steps of feeding a natural fiber coating material and a colorant to a mixer; mixing the natural fiber coating material and the colorant in the mixer to obtain a colored coating material; and supplying the colored coating material to a coating die. The feeding step includes exerting on the natural fiber coating a first gas pressure variable with at least one fiber drawing parameter; and exerting on the colorant a second gas pressure variable with at least one fiber drawing parameter.

摘要翻译： 在光纤拉伸期间着色光纤的方法，包括将天然纤维涂层材料和着色剂进料到混合器中的步骤; 在混合器中混合天然纤维涂料和着色剂以获得着色涂料; 并将着色涂料供应到涂布模具。 进料步骤包括在天然纤维上施加具有至少一个纤维拉伸参数的第一气体压力变量; 并在着色剂上施加具有至少一个纤维拉伸参数的第二气体压力变量。

公开(公告)号：US11335477B2

公开(公告)日：2022-05-17

申请号：US17056611

申请日：2018-05-25

申请人： Prysmian S.p.A.

发明人： Fabrizio Cristofani ,  Paolo Liboi ,  Silvio Frigerio ,  Giovanni Pozzati

IPC分类号： H01B7/02 ,  H01B7/282

摘要： A power cable has an insulated conductor; a copper water barrier, in form of a tube with a welding line, surrounding each insulated conductor; and a polymeric sheath surrounding each copper water barrier. The copper water barrier has a thickness and the polymeric sheath has a thickness such that a ratio between the thickness of the copper water barrier and the thickness of the polymeric sheath is 0.15 at most.

公开(公告)号：US11195640B2

公开(公告)日：2021-12-07

申请号：US17017618

申请日：2020-09-10

申请人： PRYSMIAN S.p.A.

发明人： Giovanni Pozzati ,  Fabrizio Cristofani ,  Silvio Frigerio ,  Paolo Liboi

IPC分类号： H01B7/20 ,  H01B7/14 ,  H01B7/18 ,  H01B9/00 ,  H01B13/22 ,  H01B13/24

摘要： Process for manufacturing a power cable includes: providing a power cable core having an electric conductor; providing a copper foil; providing a protective strip over the power cable core, the protective strip having a radially inner and outer surface and being made of copper with a coating; folding the copper foil around the power cable core so as to bring two longitudinal copper foil rims to contact one to the other; welding the two contacted longitudinal copper foil rims thus obtaining a copper sheath in form of a tube with a welding seam; reducing the diameter of the copper sheath to put it into direct contact with the power cable core and the protective strip; heating the protective strip and the copper sheath at a temperature higher than the melting temperature of the coating of the strip so that the coating fuses in the welding seam.